Fireproofing compound



UNITED STATES PATENT OF ICE.

A HARRY F. WATSON, OF ERIE, PENNSYLVANIA.

FIREPROOFING COMPOUND.

SPECIFICATION forming part of Letters Patent N 0. 361,196, dated April12, 1887. Applicaticnflled August I, 1885. Renewed August 19,1886.Serial No.2l1,3-l0. (No specimens.)

.To all whom it may concern.-

Be it known that I, HARRY F. WATSON, of Erie, in the county of Erie andState of Pennsylvania, have invented certain new and useful Improvementsin Fireproofing Wool, Felt, Paper,'and other Materials, of which thefollowing is a full, clear, and exact description.

Myinvention is applicable to the treatment of wool, woolen fabric,paper, deafening-felts, and other materials of like character.

, In preparing to treat the materials I-provide the following solution:acetate of lead, two parts; acetate of lime, one part; chloride ofammonia, two parts; sulphate of ammonia, four parts; sulphateoi'alumina, one part. The

material to be treated is passed through this solution, or the solutionapplied thereto, either by hand or by mechanism of any appropriatecharacter, and dried either naturally or by ar- I claim is A solutionfor fireproofiug paper, wool, and like material, consisting of acetateof lead, ace- 3o tate of lime, chloride of ammonia, sulphate of ammonia,and sulphate of alumina. in proportions substantially such as hereinspecified.

HARRY F. WATSON. Witnesses:

J. H. ARMSTRONG, R. B. HILLS.

